SU625187A1 - Two-point regulator checking arrangement - Google Patents

Description

(54) DEVICE FOR CONTROL OF TWO-POSITIONAL

REGULATOR

The invention relates to automation and can be used in automatic control and monitoring systems.

There are known devices for controlling controllers with actuators, which contain limit switches, logic elements I. signaling relays and indicator l, J2j. However c. using these devices, it is impossible to carry out an automated control without turning off the controller in the control loop and taking into account the speed characteristics of the controller.

The closest technical solution to the invention is a device for monitoring a two-position controller, comprising a starting unit and a control unit connected to an actuator mechanically coupled to a position sensor, and the first element And whose output is connected to the first indicator (h.

However, the low reliability of the control, which is expressed in the neglect of the speed characteristics of the regulator and the lack of

special control signals, requires to check the regulator of its inclusion in the work.

The aim of the invention is to increase the reliability of the control.

This is achieved by the fact that the device includes the second and third elements AND, the second and third indicators, the first and second elements BAN, the trigger and the time relay, the first input of the first and 3 APR ET is connected to the start-up unit and the input and the first, the second and third elements And, the output of the first element BANGE is connected to the first trigger input, the first output of which is connected to the input of the second BANNER element, to the input of the time relay and through the position sensor to the second input of the first BANNER element and to the second trigger input, the second output of which connected to the second input of the first element AND, the output of the time relay through the second element BANNED and the second element AND connected in series to the second indicator, and the time relay output through the three

And connected to the third

tiy element indicator.

The drawing is a diagram of the proposed device

It includes the launch block 1,

the first element And 2, the first indicator 3, the second element And 4, the third element And 5, the second and third indicators 6 and 7, the first element BAN 8, the trigger 9, the control 1O controller input 11, the time relay 12, the second element BAN

13, a position sensor 14, an actuator 15, a control unit 16 and a control input 17 of the controller 11.

The device works as follows.

The control command is sent to the start-up block 1 through the BAN 8 element, causing the appearance of a signal at the first trigger output 9.

This signal, in the absence of a control signal at input 17, acts on the control input 1O and, through the control unit 16, on the test mechanism 15 of the regulator 11, as well as on the input of the time relay 12, its start, and on the INSERT input 13.

As long as time relay 12 does not operate at the corresponding input of element 13, there is no signal, this element 13 will turn on - and through element 4 will turn on the indicator 6 Control is on, and the indicator

7 The disclaimer remains off. Since the signal from the second trigger output:

9 no, the indicator 3 is also normally turned off,

In the case of correct operation of the regulator, pa 11. The actuator 15, when the input action is fully completed, closes the contacts of the position sensor

14, giving the signal to the inverse input of the element BANCH 8 and to the second input of the TRCHGER 9, besides the BANNER element

8 turns off and the trigger 9 goes into the opposite state, in which the signal from its first output disappears,

and the signal from its second output through the first logical element I 2 turns on the indicator 3 normally, and the indicator 6 Control goes out, as the element BAN 13 turns off,

In the event of a malfunction in the controller 11, which led to the position sensor 14 not being closed by the electrical circuit, after a certain time that is longer than the time of full completion of the actuator 15

the time relay 12 is activated and the indicator 7 Failure is turned on by the signal from the logic element I 5, and the indicator 6 is turned off through the elements BAN 13 AND 4, the monitoring goes off.

The device is turned off when the input device is removed from the start-up unit 1.

The proposed device makes it possible to monitor the quality of control in comparison with known devices by introducing a special stimulating signal and taking time into account by the control controller.

Claims (3)

Invention Formula A device for monitoring the on-off controller, comprising a start-up unit, a control unit connected to an actuator mechanically coupled to a position sensor, and a first AND element whose output is connected to a first indicator, characterized in that , the second and the third elements are entered into the device, the second and the third indicators, the first and second elements of the BAN, the trigger and the time relay, the first input of the first element BANNER is connected with the start-up unit and with the first inputs of the first, second O and the third element I, the output of the first BANNER element is connected to the first trigger input, the first output of which is connected to the input of the second BANNER element, to the time relay input and through the position sensor to the second input of the first BANNER element and to the second trigger input, the second output of which connected to the second input of the first g element And, the output of the time relay through the second element BANNED and the second element AND connected in series to the second indicator, and the turn-off output through the third element And connected to the third indicator torus. Sources of information taken into account in the examination: 1, USSR Copyright Certificate No. 294162, M.cl. Cf08 B25 / 00, 1969 2., USSR Author's Certificate No. 346732, M. class. Q08 On 21/00, 1970 3. USSR author's certificate number 383090, M. class. 08 B 21/00, 197 / 7 Ilj ff ID I g.